Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 6,019	$ 6,095	$ 4,572
Other comprehensive income (loss), net of tax:
Change in net unrealized gains/losses on investments	(2,260)	(457)	428
Change in non-credit component of impairment losses on investments, net of tax	(3)	2	0
Change in net unrealized gains/losses on cash flow hedges	10	11	12
Change in net periodic pension and postretirement costs	(70)	123	(1)
Foreign currency translation adjustments	(13)	(9)	7
Other comprehensive (loss) income	(2,336)	(330)	446
Net loss attributable to noncontrolling interests	6	9	0
Other comprehensive loss attributable to noncontrolling interests	11	2	0
Total shareholders’ comprehensive income	$ 3,700	$ 5,776	$ 5,018